IIG 



LAND AND TRESII-WATER SHELLS OF N. A. [PART III. 



Fig. 231, 



Heliciua 



Helicina 



The Smithsonian Institution has jnst received 

 from Mr. Xantus a specimen of Helicina from tlie 

 iSierra Madre. I do not propose a name for it, as 

 it may already have been described in Europe 

 A figure is here given, almost twice the natural 

 size, and a figure of the lingual dentition. 



Fig. 232. 



m 



Lingual dentition of Helicina f 



